QuakeIndex

Earthquake · reviewed by a seismologist

M 3.1md

8 km N of Hatillo, Puerto Rico

· 123 km deep · released about 1,300 lb of TNT

Felt it? Tell USGS Check my area
10 km30 km60 km120 km N Camuy Municipio 14 kmHatillo Municipio 14 kmQuebradillas Municipio 15 kmIsabela Municipio 21 kmArecibo Municipio 22 kmSan Sebastián Municipio 30 kmBarceloneta Municipio 30 kmLares Municipio 32 kmMoca Municipio 34 km
Distance rings around the epicentre, with the nearest towns at their true direction and later quakes as coloured dots. Not a shaking map — see the USGS ShakeMap for that.
When
Magnitude
M 3.1 (md)
Depth
123 km below the surface
Felt
no reports yet
Nearest
Camuy Municipio, 14 km SSW
Status
Reviewed by a seismologist

USGS · last changed by USGS · we first saw it 2930 days ago

This was a small earthquake. Shaking like this is often felt indoors nearby and very rarely causes damage.

How big was it?

This earthquake released about 1,300 lb of TNT. Magnitude is logarithmic: each whole step up releases about 32 times more energy, so a magnitude 4.1 would have released about 32 times as much.

  1. Northridge, California 1994 M 6.7 270,000× the energy of this one
  2. Mineral, Virginia 2011 M 5.8 12,000× the energy of this one
  3. Magna, Utah 2020 M 5.7 8,500× the energy of this one
  4. This earthquake M 3.1 about 1,300 lb of TNT
  5. Around the size people start to feel M 3.0 this one released 1.3× more

Energy from the Gutenberg–Richter relation (log10E = 1.5M + 4.8), rounded to two figures; bar length is magnitude, which is already a logarithm of energy. Magnitudes of past earthquakes from the USGS catalogue.

Where

Epicentre 18.5635, -66.8295. Map © OpenStreetMap contributors.

Nearby places

PlaceDistanceDirection
Camuy Municipio, PR 14 km (8 mi) NNE of here earthquakes near Camuy Municipio
Hatillo Municipio, PR 14 km (9 mi) NNW of here earthquakes near Hatillo Municipio
Quebradillas Municipio, PR 15 km (9 mi) NE of here earthquakes near Quebradillas Municipio
Isabela Municipio, PR 21 km (13 mi) ENE of here earthquakes near Isabela Municipio
Arecibo Municipio, PR 22 km (14 mi) NW of here earthquakes near Arecibo Municipio
San Sebastián Municipio, PR 30 km (18 mi) NNE of here earthquakes near San Sebastián Municipio

Places and coordinates from the US Census Bureau Gazetteer (2024). Distances are from the epicentre.

Aftershocks so far

35 earthquakes have been recorded within 50 km since this one.

  1. 2.2 15 km NNE of Isabela, Puerto Rico
  2. 2.8 45 km N of Isabela, Puerto Rico
  3. 2.5 3 km ENE of Isabela, Puerto Rico
  4. 2.1 3 km WNW of Maricao, Puerto Rico
  5. 2.4 2 km ENE of Isabela, Puerto Rico
  6. 2.6 3 km NE of Quebradillas, Puerto Rico
  7. 2.5 41 km N of Isabela, Puerto Rico
  8. 2.0 4 km SSW of Añasco, Puerto Rico
  9. 1.9 6 km W of Las Marías, Puerto Rico
  10. 2.3 20 km N of Garrochales, Puerto Rico
  11. 2.2 6 km NNE of Sabana Grande, Puerto Rico
  12. 2.1 11 km SSE of Lares, Puerto Rico
  13. 2.0 9 km N of Animas, Puerto Rico
  14. 2.2 1 km W of Rafael Gonzalez, Puerto Rico
  15. 2.1 3 km SW of Maricao, Puerto Rico

Counted from the QuakeIndex database, which ingests the USGS feed every 30 seconds · as of . QuakeIndex does not forecast aftershocks. When USGS issues an operational aftershock forecast it appears on the USGS event page.

On USGS

QuakeIndex does not issue warnings. For earthquake early warning see ShakeAlert.